Who is Professor Konstantin Batygin, who is the lead author ?

Caltech planetary science professor and rock musician best known for co-proposing the mathematical theory for Planet Nine - - along with Dr. Mike Brown also at Caltech. Born in Moscow. Grew up in Japan.

Batygin is also a rock musician: He serves as the lead singer and guitarist for the rock band: The Seventh Season. Forbes named him to their "30 Under 30" list and called him "the next physics rock star".